[wip] Resource split

[paulrouget]

don't review yet

Splitting resources in 3 categories:

• support/* for files that are not necessary for libservo (usually, for ports/ packaging)
• tests/resources/ for files used for tests
• resources/ for files necessary for libservo

This is necessary when one wants to embed Servo. We don't want to have to deal with useless files. And eventually, we will want to package these files within the libservo binary (see #15635).

---

• ./mach build -d does not report any errors
• ./mach test-tidy does not report any errors
• These changes fix #17097 (github issue number if applicable).

---

This change is 

[highfive]

Heads up! This PR modifies the following files:

• @wafflespeanut: python/servo/testing_commands.py, python/servo/package_commands.py, python/servo/build_commands.py
• @jgraham: tests/wpt/run.py

[highfive]

Warning

• These commits modify unsafe code. Please review it carefully!

[jdm]

error[E0425]: cannot find function `resources_dir_path` in this scope

   --> /home/travis/build/servo/servo/tests/unit/net/fetch.rs:158:20

    |

158 |     let mut path = resources_dir_path().expect("Cannot find resource dir");

    |                    ^^^^^^^^^^^^^^^^^^ not found in this scope

    |

help: possible candidate is found in another module, you can import it into scope

    |

157 | fn test_fetch_file() use servo_config::resource_files::resources_dir_path;

    |

error[E0433]: failed to resolve. Use of undeclared type or module `std`

   --> /home/travis/build/servo/servo/tests/unit/net/fetch.rs:520:16

    |

520 |     let path = std::env::current_exe().unwrap().push("tests").push("resources");

    |                ^^^^^^^^^^^^^^^^^^^^^ Use of undeclared type or module `std`

error[E0425]: cannot find function `resources_dir_path` in this scope

   --> /home/travis/build/servo/servo/tests/unit/net/fetch.rs:533:19

    |

533 |     let ca_file = resources_dir_path().unwrap().join("self_signed_certificate_for_testing.crt");

    |                   ^^^^^^^^^^^^^^^^^^ not found in this scope

    |

help: possible candidate is found in another module, you can import it into scope

    |

514 | fn test_fetch_with_hsts() use servo_config::resource_files::resources_dir_path;

[bors-servo]

☔ The latest upstream changes (presumably #17822) made this pull request unmergeable. Please resolve the merge conflicts.

[bors-servo]

☔ The latest upstream changes (presumably #17425) made this pull request unmergeable. Please resolve the merge conflicts.

[jdm]

Closing due to inactivity.